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Inventories (Tables)
 3 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following: 
(in thousands)
September 30, 2019
 
June 30, 2019
Finished goods
$
335,437

 
$
311,684

Work in process and powder blends
200,915

 
246,414

Raw materials
84,581

 
95,620

Inventories at current cost
620,933

 
653,718

Less: LIFO valuation
(63,800
)
 
(82,142
)
Total inventories
$
557,133

 
$
571,576